Double

• Multiplication by 2
• Double precision, a floating-point representation of numbers that is typically 64 bits in length
• A double number of the form $x+yj$, where $j^2=+1$
• A 2-tuple, or ordered list of two elements, commonly called an ordered pair, denoted $(a,b)$
• Double (manifold), in topology

• A drink order of two shots of hard liquor in one glass
• A "double decker", a hamburger with two patties in a single bun

• Double, action in games whereby a competitor raises the stakes
• {{gcb|double}}, in contract bridge
• Doubling cube, in backgammon
• Double, doubling a blackjack bet in a favorable situation
• Double, a bet offered by UK bookmakers which combines two selections
• Double, villain in the video game Mega Man X4
• A kart racing game Mario Kart: Double Dash
• An arcade action game Double Dragon

• Double (association football), the act of a winning a division and primary cup competition in the same season
• Double (baseball), a two-base hit in baseball
• The Double (Seattle Mariners), Edgar Martinez's walk-off double in Game 5 of the 1995 American League Division Series
• Double (cricket), the feat of scoring a thousand first-class runs and taking a hundred first-class wickets in a single season
• Double (volleyball), scoring ten or more in a statistical category (aces, kills, blocks, digs, or assists) in a single match
• Double (Gaelic games), the act of winning the All-Ireland Senior Football Championship and the All-Ireland Senior Hurling Championship in the same year
• Double (rugby league), winning the Super League and Challenge Cup in one season
• Double-double (basketball), accumulating ten or more in two key statistical categories – points, rebounds, assists, steals, and blocked shots – in a single game
• Double Duty, competing in the Indianapolis 500 and Coca-Cola 600 on the same day or weekend.

• The Double (Dostoevsky novel), an 1846 novella by Fyodor Dostoevsky
• The Double (Saramago novel), a 2002 novel by José Saramago
• Double (manga), a 2019 manga series by Ayako Noda

• Double (filmmaking), someone who substitutes for the credited actor of a character
• The Double (1934 film), a German crime comedy film
• The Double (1963 film), a British film, part of the Edgar Wallace Mysteries series
• The Double (1971 film), an Italian film
• The Double (2011 film), a spy thriller film
• The Double (2013 film), a film based on the Dostoevsky novella
• The Double (TV series), a 2024 Chinese historical drama
• Kamen Rider Double, a 2009–10 Japanese television series
• Kamen Rider Double (character), the protagonist in a Japanese television series of the same name

• Double album, audio album spanning two units of the primary medium in which it is sold, typically records and CDs
• Double variation, a variation form in music
• Double (band), a Swiss pop duo
• Double (singer) (born 1975), a Japanese R&B singer
• Double (Roch Voisine album) (1990)
• Double (Zhao Wei album) (2005)
• "Double" (BoA song) (2003)
• "Double", a song by Blackbear from Digital Druglord (2017)
• "Double", by Yeat from 2 Alive (2022)
• "The Double", an instrumental by Clint Mansell from the Black Swan soundtrack (2010)
• The Double Violin Concerto (Bach) in D minor, BWV 1043, commonly referred to as "The Double" among violinists

• Baron Emile Double (1869–1938), vigneron who established the vineyard at Château de Beaupré
• François-Joseph Double (1776–1842), French physician
• Marie-Louise Double de Saint-Lambert (1891–1974), French philanthropist later known as Countess Lily Pastré
• Steve Double (born 1966), British politician and Member of Parliament

• Double (lunar crater), in Mare Tranquillitatis
• Double Lake, a lake in Minnesota, US

• Double, also called a look-alike or doppelgänger, one person or being that resembles another
• Polish Enigma double, a machine replicating the function of Nazi Germany's cipher machines
• Double, a former fraction of the Guernsey pound
• Double, a former rank of liturgical feast in the Roman Rite of the Catholic Church
• Dubbel, a strong Belgian Trappist beer or, more generally, a strong brown ale
• A double, a shorthand for an instance of double tradition, verses duplicated in the Biblical gospels of Matthew and Luke

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• Doubles (disambiguation)
• Doubling (disambiguation)

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